1.Product Overview The LRT404520 is a standalone precision hardened inner race sleeve for machined needle roller bearings, standard dimension 40×45×20mm. It features fully superfinished inner raceway, high hardness and wear resistance, used when the shaft surface cannot be quenched and ground. It matches perfectly with TAF455520, RNAF456220, NAX4532 needle roller assemblies to form complete heavy radial load bearing units, widely applied in machine tools, automation